%0 Journal Article
%A S. P. Novikov
%T The~analytic generalized Hopf invariant. Many-valued functionals
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1984
%P 113-124
%V 39
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1984_39_5_a5/
%G en
%F RM_1984_39_5_a5